Gas-turbine.



J. D. GEIGBR.

GAS TURBINE.

APPLICATION FILED APR.25, 1912.

Patented July 29, 1913.

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UNXTED STATESv PATENT' GFFICE.

JUDsoN D. GEIGER, or BUcYRUs, omo.

GA'SL'TURBINE.

Application filed April 25', 1912. 'Serial No. 633,094.

which Vthe motor maybe operated athigh speed'withou't vunduly heating-the blades or vanes and the driving shaft.

A secondary vobject of the invention is to provide a motor of the indicated type which will be compactly arranged and composed of few parts, so that 'the necessity lfor and cost of repairs will be tedueed to a minimum.

The invention is fully illustrated in the accompanying drawings and will be hereinafter fully described, the novel features being subsequently pointed out in the claims following the'deseript-ion.

In the drawings: Figure 1 isa sectional view of a motoreinbodyingmy improvements; and (Fig. 2 is al detail perspective view of the blade or vane.

In carrying out my present invent-ion,1

preferably employ a casing 1 which may be a sinfrle castin havinfr a artition. 2 atone 'side whereby an air chamber 3 and a. gas

chamber 4 are provided, thealr chamber be-j lng in communication with the atmosphere and the gas chamber being in communication with a suitable source of fuel supply, as will be readilyunderstood. Arranged within the outer casing and, connected there#Y with and also with the innerfedge or end of the partition 2 is a second partition 5 which is preferably dylindrical and consti` tutes one wall of a combustion chamber 7. 'A

Inletports 8 and 9 are provided'in the lower portion of this partition, andthese ports communicate, respectively, with the gas chamber 4 and the air chamber-.3 to,V admit the air and gas tothe combustion chamber where they are eommingled and ex! ploded, so as to produce vthe pro elling agent. The ports 8 and 9 are contro led by valves 10 and 11,`respectively, having their stems extended through .the outercasing 1, and these valves may be manipulated by any well `known valve gearing, a type being indicated by dotted lines in the drawing. The

Y Specification of Letters Patent.

Patented J uly 29, 1913.

mechanism for producing the explosion within the combustion chamber 7 may'fal'so be of any well known type and has been .51. omitted for the sake of clearness. The partition 5 extends entirely around the combustion chamber so as to define the same, but is interrupted at opposite sides of the motor to provide outlet ports 12 and 1.3 which lead -to expansion chambers 14 fromjwhieh noz- @si zles 15 project. Check valves 16 are provvided within the expafnsion chambers 1li-and normally cover vthe ports 1-2"and 1.3top`re vent egress of the impelling gases'.` Uponthe partition 5, diametrically opposite the 7o inlet ports, I provide a boss orlearing 17 in which is journaled the end ofthe shaft 18, the said shaft' beingho shown, and providedadjacent the,bear'in'g"v 17 with a plurality vof radial vo enijigso radial arms or spokes 20. The-blades`jor vanes 21 are secured vto the outer ends of n these' spokes 20 and are also' hollow, "as clearly shown, and communieate'with' the'g'g said spokes through perforations 22 in the ends of the same. 'lhe outer endsiofft-h" blades or vanes are Closedby caps i ing minute perforations 34A in `theirfou ends.

When the device is in motion av constant, current of air will be drawn in through the hollow shaft to pass outward through 'the-. spokes 20 and escape throughv the bladesio f' vanes 21, the said current 'of-v air serving `9o: keep the temperature of the*blades"dovii within reasonable limits, so that verhe te ing ofthe blades and the eonsetpllent` ing away or warping of the same entirely d.

a superheate'r or to another turbine whe'e or otherwise utilized. l Y

It Will be readily seen from the foregoing description, taken in connection with the a'* companying drawings', that I have provided en exceedingly `simple Irotary motor by 'i which .the expansive force of a gas maybe efficiently utilized to propel a driving shaft `at a high speed. The nozzles areso disposed, i' as to project the gases passing therethrough directly again-st the inner orconcave faces, i of the blades or vanos, and thefull force offA i the impact will thereby beutilized to propel theidriving shaft. The expansion chambers 14 receive the first discharge of the gas from the combustion chamber and permit a slight expansion of the same, so that subsequent additions to the said gas will cause the same to pass through the nozzles with considerable velocity, and the power thus utilized to its fullest extent. The cheek valves 16 positively prevent the gases flowing back into the combustion chamber, so that the operationof the machine will be continuous and uninterrupted. p Y

Having thus described my invention, what I claim is 1. lIn a gas turbine, the'combination of a combustion chamber, a nozzle in communication therewith and leading therefrom, a hollow driving shaft a hollow rotor carried by said driving shaft-external to the com-v bustionchamber and in communication with the bore of said shaft, and hollow vanes carried by said rotor and in communication with the same, said hollow. vanes eX` tending over and beyond the nozzle.

2. In a gas turbine, thecombination with a. combustion chamber and a nozzle leading 3. In agus turbine, the combination of a' 'nbustion chamber, a nozzle leading therefrom and in eonnnunication therewith, ahollow driving shaft., a hollow rotor secured on saidshaft a'nd'in communication with the bore of the same, hollow vanes carried by said rotor and arranged' to receive the impact ofgases 'issuing from the nozzle, -and :s carried by and closing the outer en'ds of the vanes and having vent openings, in their outer extremities. p

In testlmon whereof I aflixniy signature 1n presence o two wltnesses.

JUDSON D. GEIGER.

Witnesses J. GEIGER, En STAUFFER. 

